// NIVEL 3
// *********
function BrowserCheck() {
	var b = navigator.appName
	if (b=="Netscape") this.b = "ns"
	else if (b=="Microsoft Internet Explorer") this.b = "ie"
	else this.b = b
	this.v = parseInt(navigator.appVersion)
	this.ns = (this.b=="ns" && this.v>=4)
	this.ns4 = (this.b=="ns" && this.v==4)
	this.ns5 = (this.b=="ns" && this.v==5)
	this.ie = (this.b=="ie" && this.v>=4)
	this.ie4 = (navigator.userAgent.indexOf('MSIE 4')>0)
	this.ie5 = (navigator.userAgent.indexOf('MSIE 5')>0)
	if (this.ie5) this.v = 5
	this.dom = (document.getElementById)
}

is = new BrowserCheck();

function init() {
	if (is.ns4) {
		if (parent.menu.loaded) {
			location.reload();
			parent.menu.loaded=false
		}else{
			setTimeout('init()',100)
		}
	}
	marcoObj = new layerObj('marcoId');
	contenidoObj = new layerObj('contenidoId','marcoId');
	if (is.ns5) {
		contenidoObj.x = 0;
		contenidoObj.y = 0;
	}
}

function layerObj(id,padre) {
	if (is.ns) {
		if (is.ns4){
			this.css = (padre)? eval("document."+padre+".document."+id) : document.layers[id];
			this.doc = this.css.document;
			this.x = this.css.left;
			this.y = this.css.top;
		}else if (is.ns5){
			this.elm = document.getElementById(id);
			this.css = this.elm.style;
			this.x = parseInt(this.css.left);
			this.y = parseInt(this.css.top);
		}
	}else if (is.ie){
		this.elm = document.all[id];
		this.css = this.elm.style;
		this.x = this.elm.offsetLeft;
		this.y = this.elm.offsetTop;
		this.event = document.all[id];
	}
	this.activo = false;
	eval(this.obj + "=this")
	this.moveEvent = desplazaConEvento;
}

function desplazaConEvento(h) {
	if (this.activo) {
		this.x += h;
		if (this.x>0) this.x=0
		else if (this.x<margenizq) this.x=margenizq
		this.css.left = this.x;
		setTimeout(this.obj+".moveEvent("+h+")",20)
	}
}

// SCROLL TEXTO
// ****************
var upH = 13;
var upW = 13;
var downH = 13;
var downW = 13;
var dragH = 13;
var dragW = 13;
var scrollH = 152;
var speed = 4;
var dom = document.getElementById ? true:false;
var ns4 = document.layers ? true:false;
var ie4 = document.all ? true:false;
var mouseY;
var mouseX;
var clickUp = false;
var clickDown = false;
var clickDrag = false;
var clickAbove = false;
var clickBelow = false;
var timer = setTimeout("",500);
var upL;
var upT;
var downL;
var downT;
var dragL;
var dragT;
var rulerL;
var rulerT;
var contentT;
var contentH;
var contentClipH;
var scrollLength;
var startY;

function down(e){
	if((document.layers && e.which!=1) || (document.all && event.button!=1)) return true;
    getMouse(e);
    startY = (mouseY - dragT);
    if(mouseX >= upL && (mouseX <= (upL + upW)) && mouseY >= upT && (mouseY <= (upT + upH))){
	   	clickUp = true;
        return scrollUp();
    }else if(mouseX >= downL && (mouseX <= (downL + downW)) && mouseY >= downT && (mouseY <= (downT + downH))){
      	clickDown = true;
        return scrollDown();
    }else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= dragT && (mouseY <= (dragT + dragH))){
		clickDrag = true;
        return false;
    }else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= rulerT && (mouseY <= (rulerT + scrollH))){
		if(mouseY < dragT){
          	clickAbove = true;
          	clickUp = true;
     		return scrollUp();
      	}else{
         	clickBelow = true;
        	clickDown = true;
        	return scrollDown();
        }
    }else{
    	return true;
   	}
}

function move(e){
	if(clickDrag && contentH > contentClipH){
    	getMouse(e);
       	dragT = (mouseY - startY);
		if(dragT < (rulerT)) dragT = rulerT;
        if(dragT > (rulerT + scrollH - dragH)) dragT = (rulerT + scrollH - dragH);
        contentT = ((dragT - rulerT)*(1/scrollLength));
        contentT = eval('-' + contentT);
        moveTo();
        if(ie4) return false;
     }
}

function up(){
        clearTimeout(timer);
        clickUp = false;
        clickDown = false;
        clickDrag = false;
        clickAbove = false;
        clickBelow = false;
        return true;
}

function getT(){
	if(ie4){
		contentT = document.all.content.style.pixelTop;
	}else if(ns4){
		contentT = document.contentClip.document.content.top;
	}else if(dom){
		contentT =parseInt(document.getElementById("content").style.top);
	}
}

function getMouse(e){
	if(ie4){
    	mouseY = event.clientY + document.body.scrollTop;
     	mouseX = event.clientX + document.body.scrollLeft;
    }else if(ns4 || dom){
    	mouseY = e.pageY;
        mouseX = e.pageX;
    }
}

function moveTo(){
	if (dom){
		document.getElementById("content").style.top = contentT + "px";
       	document.getElementById("drag").style.top = dragT + "px";
		document.getElementById("ruler").style.top = dragT + "px";
	}else if(ie4){
    	document.all.content.style.top = contentT;
        document.all.ruler.style.top = dragT;
       	document.all.drag.style.top = dragT;
  	}else if(ns4){
     	document.contentClip.document.content.top = contentT;
       	document.ruler.top = dragT;
       	document.drag.top = dragT;
   	}
}

function scrollUp(){
	getT();
	if(clickAbove){
    	if(dragT <= (mouseY-(dragH/2))) return up();
    }
	if(clickUp){
    	if(contentT < 0){
        	dragT = dragT - (speed*scrollLength);
            if(dragT < (rulerT)) dragT = rulerT;
            contentT = contentT + speed;
            if(contentT > 0) contentT = 0;
            moveTo();
            timer = setTimeout("scrollUp()",25);
		}
	}
    return false;
}

function scrollDown(){	
	getT();
	if(clickBelow){
    	if(dragT >= (mouseY-(dragH/2))) return up();
    }
	if(clickDown){
    	if(contentT > -(contentH - contentClipH)){
			dragT = dragT + (speed*scrollLength);
            if(dragT > (rulerT + scrollH - dragH)) dragT = (rulerT + scrollH - dragH);
            contentT = contentT - speed;
            if(contentT < -(contentH - contentClipH)) contentT = -(contentH - contentClipH);
 			moveTo();
           	timer = setTimeout("scrollDown()",25);
     	}
	}
    return false;
}

function reloadPage(){
	location.reload();
}

function eventLoader(){
	if(ie4){
		upL = document.all.up.style.pixelLeft;
        upT = document.all.up.style.pixelTop;
        downL = document.all.down.style.pixelLeft;
		downT = document.all.down.style.pixelTop;
		dragL = document.all.drag.style.pixelLeft;
		dragT = document.all.drag.style.pixelTop;
        rulerT = document.all.ruler.style.pixelTop;
        contentH = parseInt(document.all.content.scrollHeight);
        contentClipH = parseInt(document.all.contentClip.style.height);
	}else if(ns4){
     	upL = document.up.left;
       	upT = document.up.top;
    	downL = document.down.left;
    	downT = document.down.top;
      	dragL = document.drag.left;
       	dragT = document.drag.top;
     	rulerT = document.ruler.top;
      	contentH = document.contentClip.document.content.clip.bottom;
      	contentClipH = document.contentClip.clip.bottom;
 	}else if(dom){
     	upL = parseInt(document.getElementById("up").style.left);
        upT = parseInt(document.getElementById("up").style.top);
        downL = parseInt(document.getElementById("down").style.left);
        downT = parseInt(document.getElementById("down").style.top);
        dragL = parseInt(document.getElementById("drag").style.left);
        dragT = parseInt(document.getElementById("drag").style.top);
        rulerT = parseInt(document.getElementById("ruler").style.top);
        contentH =parseInt(document.getElementById("content").offsetHeight);
        contentClipH =parseInt(document.getElementById("contentClip").offsetHeight);
        document.getElementById("content").style.top = 0 + "px";
	}
	
	if (contentH>contentClipH){		
		scrollLength = ((scrollH-dragH)/(contentH-contentClipH));
    	if(ns4){
    		document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE |Event.MOUSEUP);
			window.onresize = reloadPage;
   		}
	    document.onmousedown = down;
    	document.onmousemove = move;
	    document.onmouseup = up;

		document.getElementById("barra").src="../imagenes/navegacion/barra2.gif";
		document.getElementById("top").src="../imagenes/navegacion/tops.gif";
		document.getElementById("bottom").src="../imagenes/navegacion/botts.gif";
		document.getElementById("cuadrin").src="../imagenes/navegacion/cuadrin3.gif";
	}
}